Two patients with fibroma of the ileum, which was incidentally found during operation for other purpose, are presented. Case 1: A 75-year-old man. There were previous histories of undergoing an appendectomy for acute appendicitis at 18 years of age and successively, undergoing an ileocolic anastomosis for ileus. In a past 5-year period, he had been hospitalized five times for the treatment of ileus. Recently he was seen at the hospital because of an abdominal pain and vomiting. He was diagnosed as ileus and subjected to laparotomy. Since adhesive ileus was found, adhesiotomy was performed with simultaneous excision of the ileum for about 15cm in order to remove the ileocolic anastomosis site. A tumor of 20×15×15mm was found in the excised portion of the ileum, and this tumor was histologically identified as fibroma. Case 2: A 72-year-old woman showed positive reaction to occult blood in the stool examination. Close examination revealed an Isp tumor of 27×20×6mm in size in the ascending colon. This tumor was identified as adenoma by biopsy. Since a passibility of malignancy was not ruled out, a surgical removal was planned. By laparoscopic examination, a 5mm tumor was found in the ileum 8cm from the ileocecal valve. Therefore, a right hemicolectomy including the ileal tumor was performed assisted with a laparoscope. Histologically the tumor of the ileum was identified as fibroma and that of the colon as adenoma.